The 3RT5045-1AL20 is a SIRIUS S3 frame power contactor, rated for motor switching at 38 kW at 230 V and 66 kW at 400 V when the ambient hits 60 °C — that's the derated ceiling, not the 40 °C catalog number. At 690 V it still delivers 114 kW, so it handles 480 V delta-wye starts without stepping up a frame size. Insulation voltage is rated 1,000 V, and the AC-3e maximum operating voltage goes to 1,000 V — meaning this contactor lives comfortably on 690 V line-to-line systems with margin for switching transients.
Active production — no lifecycle surprises
The substance prohibitance date of 03/01/2017 aligns with RoHS and REACH compliance timelines — the contactor meets the EU substance restrictions that went into force that year. No special handling or disposal paperwork needed for standard industrial waste streams.
Screw terminals and wire range — what fits
At 40 °C the minimum permissible conductor is 50 mm²; at 60 °C it derates to 35 mm² — the terminal itself doesn't limit the ampacity, the temperature rise in the lug does. At AC-3 duty the maximum switching rate is 1,000 cycles per hour; at AC-4 it drops to 300 cycles per hour because the contact wear from inching and plugging accumulates faster.